Chusetts



No. 6l5,034. Patented Nov. 29, I898. N. C. MERRILL.

000R CHECK.

(Application filed Fain 21, 1898.)

(No Model.)

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NITED I TATES PATENT, FFICE.

NATHANIEL O. MERRILL, OF NEIV YORK, N. Y., ASSIGNOR OF TlVO-THIRDS TOALVA M. MERRILL AND \VILLIAM J. HOIVLETT, OF BOSTON, MASSA- CHUSETTS.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 615,034, dated November29, 1898.

Application filed February 21,1898. Serial No. 671,021. (No model.)

To all whom it may concern.-

Be it known that I, NATHANIEL C. MERRILL, of New York, county of NewYork, and State of New York, have invented an Improvement inDoor-Checks, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention has for its object the production of a novel door-checkor a check to obviate slamming of the door.

My improved door-check is adapted to be applied to the edge of a door,and it presents at the inner edge of the door a spring-pressed plungerto contact with the jamb of the door as the door is being closed, andthe spring cooperating with this plunger has combined with it devices bywhich the stress of the spring may be increased or diminished, accordingto the requirements of the door, its weight, 850.

Figure 1 shows a hung door with one of my improved checks appliedthereto. Fig. 2 shows an inner end view of the door-check. Fig. 3 showsthe said door-check in elevation, looking at its front side. Fig. 4 is asection in the line a: of Fig. 2, and Fig. 5 is a section in the line :0of Fig. 3.

My improved door-check is composed of a shell presenting a cylindricalbarrel a, with ears a, said ears having holes for the reception ofscrews to confine the shell to the door. The cylindrical. body a of theshell is bored at its inner end to receive the shank b of aspring-pressed plunger, the head b of the plunger lying within a hole 6in the barrel, the opposite end of the barrel being provided with aseries of screw-threads, as c, with which are engaged the threads of ascrew-plu g c, said plug having an attached thumb nut or piece 0 Betweenthe plug 0 and the head of the plunger is interposed a spring d, and byrotating the screw-plug by or through the engagement by the fingers ofthe thumb-nut c the stress of the spring d may be increased ordiminished, so that greater or less pressure will be required on theplunger to push the face b of its inner end back flush with the face aof the body.

To apply my invention to a door, the edge of the door will be providedwith a hole of suitable size to receive'the barrel a, and the ears awill be let into suitable mortises or recesses cut in the edge of thedoor, and suit able screws 0. will be put through the holes a of thecars into the edge of the door. The plunger b will project from theinner side of the door near its outer edge, and as the door is closedthe end b of the plunger will contact either with the casing, or a metalplate may be applied to the casing, and the plunger will yield under theaction of the spring (Z, thus preventing the door itself from strikingand slamming against the door casing or jamb, and when the latch of theusual lock applied to the door, said lock having a knob e, of usualshape or kind, comes opposite the striker carried by the door frame orjamb the latch of the lock will spring into the said striker, and theplunger, acting between the door and the casing, will prevent the doorfrom rattling.

It is of the greatest importance that the plug 0 be made adjustable, forotherwise the plunger cannot be suitably controlled so that it willoperate properly, for it will be readily understood that if the springis not sufficiently stiff the door will strike the casing or jamb; butby rotating the plug a greater or the proper amount of stiffness for thespring may be secured.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The herein-described door-check, comprising a barrel adapted to besecured to the door, a plunger having an enlarged head fitting Withinsaid barrel, a reduced shank extending centrally from said head, thebarrel being threaded at one end and having its other end partiallyclosed and provided with a central hole for loosely receiving saidreduced shank of the plunger, the extended head of the latter beingretained within the barrel by engaging against said closed end 9 at oneend with a hole and at its opposite end In testimony whereof I havesigned my with screw-threads, combined With a headed name to thisspecification in the presence of 10 plunger having its shank extendedthrough two subscribing witnesses.

the hole at one end of the casing, a threaded Y x T plug having anattached finger-piece, and a LA 1 HAAIE L MlihhlLL' spring interposedbetween the said plug and Witnesses:

plunger, to operate, substantially as de- MILFORD L. HUNTER,

scribed. J. M. STEVENSON.

